Determination of metal cutting machine the six principles of the goods are of good quality?

Many people in buying cutting machine or used cutting machine, don't know how to judge the quality of the cutting machine. Are generally directly to determine the effect of cutting out a product to a cutting machine quality, performance, etc. , in fact this is not scientific, because will cut by the corresponding materials, different cutting speed, cutting, cutting power will change. For cutting processing, small make up of the idea is to evaluate its processing quality mainly by the following principles:





1, cut surface is smooth, no stripes, no burr, no brittle fracture;

high-speed metal cutting machine cutting plate, the molten metal will not appear in the bottom of the beam of the incision, but it will be after the spraying of the beam. As a result, formed in the cutting edge curve, closely follow the moving beam, in order to solve this problem, we are only at the end of cutting processing to reduce the speed, thereby significantly eliminate grain production.

2, cut the size of the gap;

narrow kerf width, this is mainly related to the size of beam spot diameter, metal cutting machine cut width in general will not affect the cutting quality and cutting width has an important impact, the formation of a special part of accurate within the configuration file, this is because the cutting width determines the outline minimum inside, when the plate thickness increase, the cutting width will increase. Therefore, in order to guarantee the same high precision, no matter how the width of the cut, the workpiece in cutting machine processing area should be constant.

3, the perpendicularity of the kerf width is good, small heat affected zone.

usually, metal cutting machine cutting 5 mm below the material, the cross section vertical degree may not be the main evaluation factors, but for high power cut, when the thickness of processing more than 10 mm, the cutting edge of vertical degree becomes very important. Because when away from the focus, beam divergence, according to the location of the focus, cutting towards wider at the top or bottom. Cutting edge what percentage deviation from vertical line mm, margin is vertical, cutting quality is higher; Jia interpublic adopted by the Thai cutting machine, and machine tool by emitting beam is very stability, the 10 mm products by cutting error can be controlled up and down in the 0. Within 3 mm.

4, there is no material burning, not melt layer to form, no big slag;

the CNC cutting machine of the metal is hanged slag is mainly embodied in the sedimentary and burr, reduction of the material deposited on the surface of the workpiece, as a result of cutting, special oil began to melt. Gasification and all kinds of materials in the wind except incision without customers, however, upward or downward discharge will be formed on the surface deposition. The formation of burr is one of the important factors that affect the cutting quality, due to need extra work to remove the burr, so the seriousness of the burr and how much is the ability to directly determine the cutting quality.

5, cutting material heat affected

as a hot cutting processing equipment, metal cutting machine is bound to in the process of using thermal effects on the metal material, its embodied mainly includes three aspects: 1. Heat affected area; 2. Sag and corrosion; 3. Material deformation

one of the heat affected zone refers to cut the near along the incision area is heated. At the same time, the structure change of the metal. For example, some metal hardening will happen. Heat affected area refers to the depth of the internal structure change in the region; On cutting sag and corrosion is

have an adverse effect on the edge of the surface and affect the appearance. They appear in general should avoid cutting error; If cut sharply heating parts, it will be out of shape. This is especially important in the fine processing, because the outline and the connection piece is usually only a few millimeters wide ten points. Control power and the use of short pulse can reduce parts heat, avoid deformation.

6, rough surface plating of incision, the size of the surface roughness is the key to measure the cutting surface quality.

actually for metal cutting machine, cutting section lines and roughness of a direct link directly, often cross section lines of poor cutting performance also directly leads to roughness is higher, but considering the two kinds of different effects on the formation of different, generally we analyze metal

CNC cutting machine processing quality, still is to separate for analysis. Cutting section will form the vertical grain, grain depth determines the cutting surface roughness, the lighter the grain, the cutting section is more smooth. Edge roughness affects not only the appearance, but also affect the friction characteristics, in most cases, it is necessary to reduce the roughness, so the more shallow grain, the higher the cutting quality.

in addition to the above six principles, state of melt layer in the process of cutting and forming, directly affects the processing quality evaluation index.


cutting surface roughness is mainly to see the following three aspects:

(1) can be adjusted in the process of cutting process parameters, such as power size, cutting speed, auxiliary gas type and pressure etc.

(2) the intrinsic parameters of the cutting system, such as speckle pattern, focal length, etc. ;

3. Processing material physical parameters, such as the absorption rate, melting point, viscosity coefficient of molten metal oxide, metal oxide surface tension, etc.

in addition, the thickness of the machined part also has great influence on cutting surface quality. Relatively, the smaller the thickness of the metal workpiece, the higher the cutting surface roughness level.